Marvel Studios is no stranger to planning things well in advance of their intended release, in fact they’ve already set release dates for two untitled films in 2016 and one in 2017. Those three films have yet to be officially discussed, but Marvel Studios President Kevin Feige says they’ve got things mapped out even further down the road.

“I could arguably say what we’re planning for the year 2021,” Feige told WIRED. “Will that happen? I don’t know. But what we planned for 2015 in 2006 is happening.” Marvel’s 2015 plans include Avengers: Age of Ultron and the long awaited Ant-Man feature.

Feige also teased further expansion of the Marvel Cinematic Universe with future films. “Five years ago, looking at our plan, we knew that if Avengers was going to work, the movies had to stand alone,” he says. “Now we have to prove to the studio that we’re more than just these five characters, these five franchises.”

It has been hinted in the past that Marvel has plans for new characters in Phase Three like Doctor Strange and The Black Panther. Either of those could take on these future release dates as could a Marvel’s The Avengers 3 (likely for 2017), another sequel to an existing film or even a completely new surprise.

What characters do you want to see Marvel try out in the future? Sound off below!